IEC_TS_60079-39-2015.pdf

IEC TS 60079-39 Edition 1.0 2015-06 TECHNICAL SPECIFICATION Explosive atmospheres Part 39:Intrinsically safe systems with electronically controlled spark duration limitation IEC TS 60079-39:2015-06(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch A bout the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical infor mation on IEC Inter national Standards,Technical Specifications,Technical Reports and other documents.Available for PC,Mac OS,Andr oid Tablets and iPad.IEC publications search-www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criter ia(r efer ence number,text,technical committee,).It also gives information on pr ojects,replaced and w ithdr awn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and also once a month by email.Electropedia-www.electropedia.org The w or lds leading online dictionary of electronic and electr ical ter ms containing more than 30 000 ter ms and definitions in English and French,w ith equivalent ter ms in 15 additional languages.Also known as the Inter national Electr otechnical Vocabulary (IEV)online.IEC Glossary -std.iec.ch/glossary Mor e than 60 000 electrotechnical terminology entries in English and Fr ench extr acted fr om the Terms and Definitions clause of IEC publications issued since 2002.Some entr ies have been collected fr om ear lier publications of IEC TC 37,77,86 and CISPR.IEC Customer Serv ice Centre-webstore.iec.ch/csc If you w ish to give us y our feedback on this publication or need further assistance,please contact the Customer Ser vice Centr e:csciec.ch.IEC TS 60079-39 Edition 1.0 2015-06 TECHNICAL SPECIFICATION Explosive atmospheres Part 39:Intrinsically safe systems with electronically controlled spark duration limitation INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.260.20 ISBN 978-2-8322-2734-3 Registered trademark of the International Electrotechnical Commission Warning!Make sure that y ou obtained this publication from an authorized distributor.colourinside 2 IEC TS 60079-39:2015 IEC 2015 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 2 Normative references.8 3 Definitions.9 4 Power-i architecture.10 5 Requirements for Power-i devices.11 5.1 General.11 5.2 Power-i source.11 5.3 Power-i field device.13 5.4 Power-i wiring.14 5.5 Power-i terminator.15 5.6 Test instruments for Power-i loop check.15 5.7 Power-i application classes.15 6 System requirements.16 6.1 Selection of the permissible Power-i current class of the Power-i source.16 6.2 Verification of a Power-i system.17 7 Assessment and testing.19 7.1 Procedure to define safety-relevant parameters.19 7.2 Type test.20 7.3 Routine test.20 8 Marking of Power-i devices.20 8.1 General.20 8.2 Examples of marking.20 9 Instructions.21 Annex A(normative)Assessment of Power-i safety parameters.22 A.1 General.22 A.2 Power-i specific test equipment.22 A.2.1 Power-i universal test equipment.22 A.2.2 Power-i dummy load.23 A.3 Determination of the safety-relevant parameters for Power-i devices and Power-i wiring.24 A.3.1 General.24 A.3.2 Safety-relevant parameters for the Power-i source.24 A.3.3 Safety-relevant parameters for the Power-i field devices.31 A.3.4 Safety-relevant parameters for Power-i wiring.34 A.3.5 Safety-relevant parameters for the Power-i terminator.36 Annex B(informative)Explanation and details of the Power-i basic concept.37 B.1 Physical basics of an ignition.37 B.2 Output characteristics of a Power-i source.39 B.3 Measurement and scientific results as basis for Power-i minimum ignition values.41 B.3.1 Test setups for the determination of the ignition probability.41 B.3.2 Result of the spark ignition tests and their implementation in Table 3.43 IEC TS 60079-39:2015 IEC 2015 3 Annex C